
$(document).ready(function(e) {			
	t = $('.help_menu').offset().top;
	mh = $('.help').height();
	fh = $('.help_menu').height();
	$(window).scroll(function(e){
		s = $(document).scrollTop();	
		if(s > t - 0){
			$('.help_menu').css('position','fixed');
			if(s + fh > mh){
				$('.help_menu').css('top','0px');	
			}				
		}else{
			$('.help_menu').css('position','');
		}
	})
});
